A cost effective hydrogen evolution reaction (HER) catalyst that does not use precious metallic elements is a crucial demand for environment-benign energy production. The family of earth-abundant transition metal compounds of nitrides, carbides, chalcogenides, and phosphides is one of the promising candidates for such a purpose, particularly in acidic conditions. However, its catalytic performance is still needed to be enhanced through novel material designs and crystalline engineering. Herein, a chemically and electronically coupled transition metal phosphosulfide/N-doped carbon nanotubes (NCNT) hybrid electrocatalyst is fabricated via a two-step synthesis. The uniquely designed synthesis leads to the material morphology featuring a core–shell structure, in which the crystalline metal phosphide core is surrounded by an amorphous phosphosulfide nanoshell. Notably, due to the favorable modification of chemical composition and surface properties, core–shell CoP@PS/NCNT exhibits the noticeable HER activity of approximately −80 mV @ −10 mA cm−2 with excellent durability, which is one of the highest active nonnoble metal electrocatalysts ever reported thus far.
Bibliographical noteFunding Information:
D.J.L. and J.K. contributed equally to this work. This work was supported by the Global Frontier Hybrid Interface Materials (GFHIM) (Grant No. 2013M3A6B1078874), Nano Material Technology Development Program (Grant No. 2016M3A7B4905613), and the Multi-Dimensional Directed Nanoscale Assembly Creative Research Initiative (CRI) Center (Grant No. 2015R1A3A2033061) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)